MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/17/01 through 03/23/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 216 410 626
Davis 105 1 106
Irvine 166 0 166
Los Angeles 4 109 113
Riverside 68 15 83
San Diego 16 35 51
San Francisco 29 0 29
Santa Barbara 15 47 62
Santa Cruz 28 42 70
LBL 0 6 6
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 6 53 59
Stanford 45
Other-Network UC n/a 142 142
_______ ______ _____
653 864 1,562
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 27 89 1,155
2-4 a.m. 15 54 1,000
4-6 a.m. 3 6 30
6-8 a.m. 19 60 375
8-10 a.m. 157 500 4,033
10-12 a.m. 278 787 9,447
12-2 p.m. 277 786 10,594
2-4 p.m. 316 788 8,298
4-6 p.m. 187 664 7,085
6-8 p.m. 110 399 4,117
8-10 p.m. 98 349 3,203
10-12 p.m. 75 244 2,470
__________ __________ __________ _________________
Total: 1,562 4,726 51,807
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 711 1,241 1,952
Davis 321 4 325
Irvine 547 0 547
Los Angeles 21 283 304
Riverside 174 40 214
San Diego 44 88 132
San Francisco 66 0 66
Santa Barbara 31 180 211
Santa Cruz 88 79 167
LBL 0 17 17
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 7 165 172
Stanford 151
Other-Network UC n/a 463 463
_______ ______ _____
2,010 2,565 4,726
Number of FIND commands by database
MAGS database 4,218
NEWS database 443
COMP database 65
Total number of FIND commands 4,726
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,402 14,998 22,400
Davis 2,361 38 2,399
Irvine 4,701 0 4,701
Los Angeles 503 3,922 4,425
Riverside 2,636 735 3,371
San Diego 601 394 995
San Francisco 1,047 0 1,047
Santa Barbara 262 1,269 1,531
Santa Cruz 752 1,034 1,786
LBL 0 203 203
LLL 0 31 31
Los Alamos n/a 0 0
Other - UC 113 2,533 2,646
Stanford 209
Other-Network UC n/a 5,127 5,127
_______ ______ _____
20,378 30,284 50,871
Number of Records Displayed by database:
MAGS database 47,980
NEWS database 3,168
COMP database 659
Total number of Records Displayed 50,871
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.3%
Percent of NEWS sessions 9.9%
Percent of COMP sessions 2.8%
Percent of searches done in the MAGS database 89.3%
Percent of searches done in the NEWS database 9.4%
Percent of searches done in the COMP database 1.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 1.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:16
Average session length (minutes:seconds) 11:30
Longest session recorded (minutes:seconds) 168:17
Average number of searches completed per session 3.1
Retrievals per search - median 5.0
Retrievals per search - average 473.3
Retrievals per search - standard deviation 5723.0
Percent of searches completed with 0 results 29.9%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 45.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,929 28.2%
DISPLAY (excluding automatic displays) 5,561 39.8%
HELP 399 2.9%
EXPLAIN 346 2.5%
SET/RESET 491 3.5%
SHOW 48 0.3%
ADD ON (AND, OR, AND NOT) 289 2.1%
LOGON or LOGOFF 1,869 13.4%
COMMENT 0 0.0%
SAVE 247 1.8%
USE 7 0.1%
OTHER 770 5.5%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 755 18.7% 192 25.4% 10 65.0 215.8
TITLE WORD 988 24.4% 296 30.0% 13 250.1 1764.9
EXACT TITLE 154 3.8% 57 37.0% 2 26.9 102.5
JOURNAL 177 4.4% 78 44.1% 919 2896.2 4501.7
EXACT JOURNAL 74 1.8% 29 39.2% 508 5018.5 10776.8
SUBJECT 860 21.3% 337 39.2% 30 300.5 1659.2
EXACT SUBJECT 29 0.7% 20 69.0% 9 36.3 79.8
KEYWORD 820 20.3% 167 20.4% 33 1642.0 13738.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 13 0.3% 3 23.1% 16 27.0 30.0
DATE 30 0.7% 6 20.0% 25 41.9 48.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 106 2.6% 23 21.7% 8 48.3 123.5
EXACT PE 18 0.4% 1 5.6% 4 8.4 10.4
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 17 0.4% 2 11.8% 1,953 2879.3 3422.9
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 147 3.8% 46 31.3% 25 489.6 1638.3
Single 3,745 96.2% 1,119 29.9% 18 725.2 7195.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 63.6%
LONG 1.1%
FIELDS 1.1%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 30.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:31
Average session length (minutes:seconds) 7:41
Longest session recorded (minutes:seconds) 55:35
Average number of searches completed per session 1.5
Retrievals per search - median 1.0
Retrievals per search - average 77.3
Retrievals per search - standard deviation 252.4
Percent of searches completed with 0 results 44.6%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 62 24.0%
DISPLAY (excluding automatic displays) 77 29.8%
HELP 10 3.9%
EXPLAIN 7 2.7%
SET/RESET 24 9.3%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 3 1.2%
LOGON or LOGOFF 54 20.9%
COMMENT 0 0.0%
SAVE 7 2.7%
USE 0 0.0%
OTHER 14 5.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 10 14.9% 6 60.0% 2 1.5 0.6
TITLE WORD 19 28.4% 6 31.6% 11 51.3 92.2
EXACT TITLE 1 1.5% 1 100% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 10 14.9% 8 80.0% 39 38.5 41.7
EXACT SUBJECT 1 1.5% 0 0.0% 52 52.0 0.0
KEYWORD 22 32.8% 7 31.8% 22 281.5 473.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4 6.0% 1 25.0% 22 25.3 25.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 5 8.1% 1 20.0% 12 19.5 23.6
Single 57 91.9% 27 47.4% 11 164.8 354.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.0%
SHORT 62.7%
LONG 0.0%
FIELDS 3.2%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 30.2%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,022
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 28
displays or when any of these paging options is set.
TEXT included with MAIL commands 252
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:16
Average session length (minutes:seconds) 8:14
Longest session recorded (minutes:seconds) 59:53
Average number of searches completed per session 2.8
Retrievals per search - median 9.0
Retrievals per search - average 2222.0
Retrievals per search - standard deviation 40306
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 57.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 427 37.9%
DISPLAY (excluding automatic displays) 232 20.6%
HELP 40 3.5%
EXPLAIN 50 4.4%
SET/RESET 65 5.8%
SHOW 4 0.4%
ADD ON (AND, OR, AND NOT) 16 1.4%
LOGON or LOGOFF 197 17.5%
COMMENT 0 0.0%
SAVE 44 3.9%
USE 0 0.0%
OTHER 52 4.6%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 39 7.2% 24 61.5% 42 212.0 625.2
TITLE WORD 81 15.0% 25 30.9% 14 495.3 1121.3
EXACT TITLE 12 2.2% 5 41.7% 1 1.1 0.4
JOURNAL 3 0.6% 2 66.7% 845416 845416 0.0
EXACT JOURNAL 5 0.9% 3 60.0% 7 6.5 2.1
SUBJECT 85 15.7% 41 48.2% 17 246.1 595.2
EXACT SUBJECT 76 14.1% 7 9.2% 42 83.9 121.1
KEYWORD 117 21.7% 17 14.5% 29 817.6 2095.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.2% 0 0.0% 5 5.0 0.0
DATE 106 19.6% 5 4.7% 32 59.6 83.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 9 1.7% 1 11.1% 12 12.4 11.1
EXACT PE 6 1.1% 0 0.0% 10 18.3 21.3
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 114 26.9% 8 7.0% 30 57.2 81.9
Single 310 73.1% 113 36.4% 27 4917.9 60211.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 35.8%
LONG 1.8%
FIELDS 0.5%
PERIODICALS 4.1%
COMMENTS 0.0%
Other 55.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. First word of command is invalid 35.3%
2. NS command - no next screen 24.0%
3. FIND command with invalid index name 14.6%
4. PS command - no previous screen 4.8%
5. DISPLAY command contains invalid word 3.6%
6. Valid command at an inappropriate time 2.9%
7. Search term missing from search command 1.5%
8. MAIL command issued w/o email address 1.2%
9. DISPLAY command - no FIND results 0.9%
10. Add-on search, no index name after verb 0.6%
11. All others 10.6%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 22.1%
2. GUIDE 21.3%
3. FIND 10.2%
4. COMMANDS 8.9%
5. INDEXES 5.5%
6. Unrecognized term 5.5%
7. MAGS DATABASE 3.5%
8. MAIL 3.0%
9. NEWS DATABASE 1.5%
10. DISPLAYS (IAC DBS) 1.5%
11. All others 17.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.0%
2. First word of command is invalid 16.5%
3. FIND command with invalid index name 10.8%
4. FIND command with zero results 5.9%
5. DISPLAY command-complete in one screen 5.8%
6. DISPLAY command-first of >1 screen 5.6%
7. DISPLAY command - middle of >1 screen 5.6%
8. DISPLAY command - last of >1 screen 2.5%
9. FIND command retrieves >1 book 2.3%
10. PS command - no previous screen 2.0%
11. All others 14.0%
Ten most frequent SHOW requests:
1. HISTORY 40.4%
2. SEARCH 26.9%
3. MAIL STATUS 15.4%
4. MAIL SETTINGS 5.8%
5. GLOSSARY 3.8%
6. IAC NEWS 1.9%
7. SETTINGS (IAC DBS) 1.9%
8. SYSTEM NEWS 1.9%
9. DISPLAY 1.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)